Abstract: A piston arrangement including a track and a piston moveable within a cylinder; wherein the track is adapted to rotate relative to the cylinder about an axis of rotation and has a cam surface and an edge surface extending away from the cam surface; wherein the piston is coupled to the track by a follower running on the cam surface; wherein the cam surface is shaped such that, as the track moves relative to the cylinder, the piston head moves in reciprocating motion within the cylinder in accordance with the path of the cam surface; wherein a stabilising element is connected to the piston, the stabilising element extending below the piston head and comprising a contact surface which engages the edge surface of the track.

Abstract: An internal combustion engine with a cylinder and with a crank drive is described herein. The internal combustion engine includes a crankshaft in which the crankshaft mounted in a crankcase has an associated crankshaft throw for the cylinder. The internal combustion engine further includes a compensation weight serving as a counterbalance for mass compensation arranged on the crankshaft on the side opposite the crankshaft throw, where the compensation weight includes an outward-facing side and a distance from a peripheral surface of the outward-facing side to a longitudinal axis of the crankshaft is not constant along the length of the peripheral surface of the outward-facing side.

Abstract: Disclosed is a hybrid type air-compressor, which has a main body including a cylinder having upper and lower portions, a motor assembly including an eccentric shaft passing through a side surface of the main body to eccentrically rotate in the cylinder, a first communication part covering an upper portion of the cylinder of the main body and introducing air to discharge the air to the upper portion of the cylinder, a second communication part covering a lower portion of the cylinder of the main body and introducing air to discharge the air to the lower portion of the cylinder; and an air compressing means connected to the eccentric shaft of the motor assembly and vertically moving in the cylinder to alternately compress air introduced into the upper and lower portions of the cylinder.

Abstract: A pump primarily for liquid paint includes first and second pistons reciprocable rectilinearly in respective first and second cylinders. The first and second pistons are moved relative to their respective pistons by operation of an A. C. electric motor the rotary output shaft of which is coupled to the first and second pistons by a constant velocity cam and a cam follower mechanism converting rotary motion of the output shaft into reciprocatory motion of the first and second pistons 180° out of phase with one another.

Abstract: An oilless high pressure pump suitable for use in devices such as pressure washers and the like is described. The pump includes an eccentric assembly suitable for converting rotary motion of a rotating shaft to rectilinear motion. One or more straps couple the eccentric assembly to a piston assembly. The straps communicate the rectilinear motion of the eccentric assembly to the piston assembly, reciprocating the piston assembly to pump the liquid.

Abstract: An oilless high pressure pump suitable for use in devices such as pressure washers and the like is described. The pump includes an eccentric assembly suitable for converting rotary motion of a rotating shaft to rectilinear motion. One or more straps couple the eccentric assembly to a piston assembly. The straps communicate the rectilinear motion of the eccentric assembly to the piston assembly, reciprocating the piston assembly to pump the liquid.

Abstract: An oilless high pressure pump suitable for use in devices such as pressure washers and the like is described. The pump includes an eccentric assembly suitable for converting rotary motion of a rotating shaft to rectilinear motion. One or more straps couple the eccentric assembly to the pump's piston assembly. The straps communicate the rectilinear motion of the eccentric assembly to the piston assembly for reciprocating the pump's pistons to pump the liquid.

Abstract: An apparatus is described for capturing a bearing assembly in a device such as a high pressure pump or the like so that undesired pre-load within the bearing assembly is substantially reduced or eliminated. The apparatus is comprised of a fastener for capturing the bearing assembly by securing the bearing assembly to the shaft of the pump's eccentric assembly. A collet is disposed in the bearing assembly around the fastener. The fastener includes a tapered section for at least partially expanding the collet so that the collet engages the bearing assembly capturing the bearing assembly and controlling the amount of pre-load placed thereon.

Abstract: A multi-stage piston actuator includes an operation stem, a plurality of pistons provided on the operation stem at different axial positions, a cylinder in which the pistons are slidably fitted, and a separation wall provided within the cylinder, which defines pressure chambers corresponding to the pistons. The separation wall is made of a cup-shaped member which is provided with a central cylindrical portion in which the operation stem slides, a peripheral cylindrical portion which is fitted in and secured to an inner wall surface of the cylinder, and a circular disc portion which connects the central cylindrical portion and the peripheral cylindrical portion.

Abstract: An oilless reciprocating air compressor that is mountable on the inside wall of a cargo container. The compressor has a high strength cast metal crank case and a lighter motor housing attached thereto. A special bracket is provided that attaches to both the crank case and the motor housing to support the motor shaft in a horizontal plane and the opposed cylinders of the compressor in a vertical plane adjacent to the wall. Because this compressor mounted inside the container cooling fans and the like are not required, thus lightening the compressor and allowing for a compact unit that can be safely secured to the cargo container wall.

Abstract: An air-powered actuator having a body with first and second ends, an axially transverse annular bulkhead positioned therebetween, and an output shaft with a splined exterior portion. The body includes first and second end walls with each end wall having a sleeve mounted coaxially within the body about the shaft and projecting axially inward within the body. A piston sleeve is disposed for axial reciprocating movement within the body. The piston sleeve has a pair of piston heads, an outer sleeve, and an inner sleeve. The outer sleeve is mounted coaxially within the body inward of the bulkhead and about the first and second sleeves to define therewith a fluid-tight outer chamber containing the piston heads, each positioned to an opposite side of the bulkhead to define four fluid-tight chambers and to which pressurized air is applied. Also defined is a fluid-tight inner chamber containing lubricating oil. The outer sleeve is attached to the piston heads for reciprocating travel therewith.

Abstract: Pump or motor comprising at least one cylinder housing being closed at both ends and a piston body received in said housing so that at both ends of said housing a working compartment is formed, the piston body being provided with a cavity shaped such that in it one piston rod can be received, one end of which is connected to the piston body and the other end to a crankshaft which pass through the piston body.

Abstract: A mechanism for converting linear displacement of a piston to angular displacement of a shaft by positioning a cam in a recess of a unitary piston which is adapted for positioning by differential fluid forces applied to opposite ends of the piston. To provide a linear displacement drive for a shaft positioned to rotate about an axis perpendicular to the axis of the piston, a cam profile consisting of two symmetrical, opposite and identical involutes is employed.

Abstract: A rotary/linear convertor which comprises a first member may be in the form of a piston (14, 15, 16, 17, 114, 115, 116, 117) and a guide which is preferably in the form of a cylinder (12, 112) the first member being arranged for linear movement within or along the guide and a second member (23, 24, 137) which is adapted for rotational movement. The convertor further includes connecting means operatively connecting the first and second members so that the respective linear or rotational movement of one member causes the respective linear or rotational movement of the other member.

Abstract: An actuator including a first cylinder chamber and a second cylinder chamber defined as separate entities in a cylinder for receiving a first piston and a second piston therein respectively. One of the first and second cylinder chambers is connected to an oil pressure source and the other cylinder chamber is connected to an air pressure source. A piston rod of the first piston and a piston rod of the second piston which move in relative sliding movement have at their forward ends separate operating portions for performing operations on a common workpiece.

Abstract: The Compressor is small, compact and lightweight in that it is formed of the barest essentials. It has a pair of in-line cylinders, with pistons reciprocatable therein, and the crankshaft, having only one crank, is drivingly coupled to one of the pistons. The other piston is fastened to the crank-driven piston, in spaced-apart disposition, for a common reciprocation of the two. One of the cylinders serves as the crankcase.

Abstract: Fluid motor actuator having two pistons reversely movable in a common cylinder, the pistons each carrying at least three extensions on their proximal sides, one of which being provided with a rack camming with one common spur gear fastened on a transverse shaft projecting from the cylinder, the extensions with their outer surfaces lying in one common cylindrical outer surface.

Abstract: A device for controlling two output elements pivotally mounted with respect to two stationary elements is provided with two coaxial rectilinear double action pressure fluid jacks. The two stationary elements are respectively secured to the ends of a stationary outer longitudinal elongated member while the two pivoting elements are respectively secured to the ends of pivotal inner longitudinal elongated member coaxially arranged in said outer member. The jacks are of annular configuration and formed between the outer and inner aforesaid members with a common median bottom and annularly slotted cylinder-heads remote from each other. The tubular piston rod of each jack extends in leak-tight manner through the annularly slotted cylinder-head and is angularly positioned on the one hand, with respect to the corresponding stationary element by a first set of guides and on the other hand with respect to the corresponding pivoting element by a second set of guides forming an angle relative to the first set of guides.

Abstract: A swash plate type compressor to provide reciprocation of cylindrical guide members arranged around a driving shaft axis and a corresponding number of pistons respectively connected to the cylindrical guide members with lubricating means arranged in compartments to prevent leakage of lubricant to the pistons.

Abstract: A vaned hydraulic motor which includes a rotor adapted to rotate in excess of 180.degree. with respect to the stator, has, in an axial juxtaposition, a middle circumference annular chamber and two outer circumferential annular chambers flanking the middle annular chamber. The axial width dimension of each of the outer annular chambers is one half of the axial width dimension of the middle annular chamber. In each annular chamber there are disposed first and second radial partitions forming a separate partition pair for subdividing each annular chamber into two pressure chambers. The first partition of each pair is affixed to the stator and the second partition of each pair is affixed to the rotor. Further, the second partition in the middle annular chamber is offset 180.degree. with respect to the second partition in each outer annular chamber.

Abstract: A uniflow steam engine of the multi-cylinder type wherein the cylinders are rotatably mounted within a jacket having a sinusoidal cam track therein. Extending through slots, the ends of which are the exhaust ports in the cylinders and into the cam track are cam followers which are mounted on the pistons for reciprocable movement therewith. At the head end of the cylinders there are apertures which rotate with registered cutouts in superimposed valve rings that control the flow of steam from manifolds at the head ends of each of the cylinders into the cylinders as the cylinders rotate. By adjusting the relative position between the valve rings, the length of time of steam introduced on each cycle may be adjusted and by concomitantly rotating both valve rings, the initial time for introduction of steam may be adjusted to alter lead or reverse torque.